Question

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Answer 1

Answer:

Sum of 12ab-10b2 -18a2 and 9ab + 12b2 + 14a2 = 12ab – 10b2 – 18a2 + 9ab + 12b2 + 14a2

On combining the like terms,

= 12ab + 9ab – 10b2 + 12b2 – 18a2 + 14a2 = 21 ab +2b2 – 4a2

Sum of ab + 2b2 and 3b2 – a2 = ab + 2b2 + 3b2 – a2 = ab + 5b2 – a2

Now, subtracting 21ab + 2b2 – 4a2 from ab + 5b2 – a2, we get = (ab + 5b2 – a2) – (21ab + 2b2 – 4a2) = ab+ 5b2 – a2 – 21ab – 2b2 + 4a2

On combining the like terms,

= ab – 21ab + 5b2 – 2b2 – a2 + 4a2 = – 20ab + 3b2 + 3a2 = 3a2 + 3b2 – 20ab

Step-by-step explanation:

Hope it helps

Answer 2

Answer:

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